The fingerspelling sign for "L" actually looks like a written "L" when it is made with palm out and with the right hand.
If a signer's dominant hand is their left one, how should they make this sign -
- with palm out, so that it look likes a backward "L", or
- with palm in, so that it looks like an "L"?
Similarly, how should the sign for "ILY" be made by a left-handed signer?